Tried to boot into safe mode now monitor doesn't work.
I changed windows 10 to boot into safe mode for some troubleshooting. Using msconfig.exe switched to safe mode using minimal settings and after restarting the computer the computer doesn't recognize the monitor and I get zero activity. I can hear the PC running.
Did you try again in safe mode & does it still work there?
When booting can you see the BIOS/UEFI startup info?